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<h2>Lindenmayer Systems</h2> 
By Daniel Kuebrich
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<p>Lindenmayer Systems (or <a href="http://en.wikipedia.org/wiki/Lindenmayer_system">L-systems</a>) are rule production systems which generate certain patterns (notably tree structures and fractals) commonly seen.  A little about L-systems:
            <a href="http://www.biologie.uni-hamburg.de/b-online/e28_3/lsys.html">http://www.biologie.uni-hamburg.de/b-online/e28_3/lsys.html</a><br> 

<h3>Usage</h3>
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<li> Under the <tt>Draw</tt> tab, enter the angle and the distance (the length of each line), and press the <tt>Set</tt> button.
<li> Under the <tt>Rules</tt> tab, enter the seed and the production rules
<li> Enter number of expansions and click <tt>Calculate</tt> to expand the rules into the symbol string. 
<li> Press the play button on this console to interpret the symbol string and draw draw the result. 
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<p>You can also load rulesets with the <tt>Load</tt> button.  There are several example rulesets in the <tt>mason/sim/app/lsystem/</tt> directory.  Each ends with the <tt>.lss</tt> extension.
            
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